Open .pkg File

xar (short for eXtensible ARchive) is an open source file archiver and the archiver¡¯s file format. It was created within the OpenDarwin project and is used in Mac OS X 10.5 for software installation routines, as well as browser extensions in Safari 5.0. Xar replaced the use of gzipped pax files.

You can right click on PNG file, select Open with Photos. Note that Photos app came pre-installed with Windows 10. If you still can't find Photos app on your system, install it from Microsoft Store. You can set Photos app as default app for.png files. Download APK Installer and Launcher for Windows to view, install, and launch APK files on a Windows PC. APK Installer and Launcher has had 0 updates within the past 6 months. One of the best software to open PKG files on Windows 10 PC is Easy Symbian Suite. This program is specific to Symbian file as it enables you to make changes on files that are used by Symbian Series 60 devices. Easy Symbian Suite is packaged as a suite of 7 programs that are connected to each other via a simple interface on the program.

pkg is just .xar archives with a different extension and a specified file hierarchy. pkg is an OS X Installer file. This file format is used by Apple Inc. on its Macintosh line of computers and on the iPhone. It is also used by Sony PlayStation 3 on downloadable content over PlayStation Network. The contents of a PKG file can be installed using the Apple Installer application.

The XAR project aims to provide an easily extensible archive format. Important design decisions include an easily extensible XML table of contents for random access to archived files, storing the toc at the beginning of the archive to allow for efficient handling of streamed archives, the ability to handle files of arbitrarily large sizes, the ability to choose independent encodings for individual files in the archive, the ability to store checksums for individual files in both compressed and uncompressed form, and the ability to query the table of content's rich meta-data.

  1. ONEPKG files are opened by Microsoft's OneNote tool. You can download OneNote free from You can back up your own.ONE files to a.ONEPKG file through OneNote's File Export Notebook menu option. Just choose to export the notebook to a OneNote Package file.
  2. Open APK File APK files are used by Google Android operating system to store installation packages for applications. APK package stores compiled Android application. It also contains all resources which are required for Android application to run.

The XAR file format has three main regions, The Header, The Table of Contents, and The Heap. The header is a small binary data structure that identifies the file format (file magic). The table of contents is parsed as an XML document. The heap occupies the remainder of the file. Files' data are stored in the heap.

Files in xar are individually compressed. This allows for quick extraction of individual files without the extra disk space requirements and CPU usage of extracting the entire archive, as compared to a compressed tar archive. This makes xar useful for quick restores of accidentally deleted or overwritten files, from a backup archive. Additionally, this means xar can use different compression methods for each file in the archive. For instance, it might not be a good idea to try to try to compress an already compressed file, but a large file might benefit greatly from using bzip2, whereas a small text file would be better served to use gzip.

Open/Extract xar/pkg File on Windows

Easy 7-Zip opens/extracts xar/pkg file easily on Windows. The Easy 7-Zip was developed based on 7-Zip. 7-Zip is a famous open source file archiver. The Easy 7-Zip is an easy-to-use version of 7-Zip. The open source freeware keeps all features of 7-Zip and adds a few useful features that makes the software more user-friendly.

Easy 7-Zip works on Windows 10/8.1/8/7/Vista/2008/2003/XP/2000 (both 32-bit and 64-bit compatible).

  1. Free Download Easy 7-Zip
  2. Install Easy 7-Zip by step-by-step instructions
  3. The installation will associate xar/pkg with Easy 7-Zip automatically
  4. Double-click on xar/pkg file to open xar/pkg file with Easy 7-Zip

  5. You will see files or folders within the xar/pkg file then, click button Extract to extract the xar/pkg file.
  6. Alternatively, Right-click on xar/pkg file on Windows Explorer

  7. And then, choose Extract files..., Extract Here, or Extract to 'folder' to extract the xar/pkg file.
  8. Done

Easy 7-Zip Download Links:

Open/Extract xar/pkg File on Mac

You can open pkg file directly on Mac. If you want to extract xar/pkg you need to install extra software. B1 Free Archiver opens/extracts xar/pkg file on Mac. B1 Free Archiver is a free software for creating archive folder and extracting archive file. B1 Archiver works on all platforms - Windows, Linux, Mac and Android. The freeware supports most popular formats including xar/pkg.

B1 Free Archiver is compatible with:

  • Mac OS X 10.9 Mavericks
  • Mac OS X 10.8 Mountain Lion
  • Mac OS X 10.7 Lion
  • Mac OS X 10.6 Snow Leopard

Open/Extract xar/pkg File on Linux

You need to install xar on Linux.

# wget
# tar zxvf xar-1.5.2.tar.gz
# cd xar-1.5.2
# ./configure
# make
# make install

If an error 'configure: error: Cannot configure without xml2-config' occurs when running configure, please install libxml2-dev. On Debian, type:

# apt-get install libxml2-dev

List folders and files in xar/pkg:

$ xar -tf archive.xar
$ xar -tf archive.pkg

Open/Extract xar/pkg file with xar on Linux:

$ xar -xvf archive.xar
$ xar -xvf archive.pkg

xar command options:

  • -t: Lists an archive
  • -x: Extracts an archive
  • -v: Print filenames as they are archived
  • -f: Specifies an archive to operate on

Alternatively, you can use p7zip to extract xar/pkg file. p7zip is the Unix command-line port of 7-Zip.

Open .pkg File

Install p7zip-full on CentOS and Fedora

# yum install p7zip-full

Install p7zip-full on Debian and Ubuntu

$ sudo apt-get install p7zip-full

List directories and files in xar/pkg file

$ 7z l archive.xar
$ 7z l archive.pkg

Extract xar/pkg file with p7zip on Linux

$ 7z x archive.xar
$ 7z x archive.pkg
Copyright © 2013-2017 James Hoo All rights reserved.2 file types use the .nupkg file extension.
  • 1.NuGet Package
  • 2.NetUpdate Package

File Type 1NuGet Package

CategoryDeveloper Files

What is a NUPKG file?

A NUPKG file is a code package used by NuGet, a Microsoft Visual Studio component that allows developers to create and share packages for use in .NET projects. It contains packaged source code, as well as instructions for how to use that code. NUPKG files are built from .NUSPEC files, which are themselves built from .DLL assemblies.

Prior to 2012, developers had to manually install NuGet as an extension to Microsoft Visual Studio. But over time, NuGet and the NUPKG format proved so essential that Microsoft began installing NuGet Package Manager with Visual Studio by default. These days, developers share thousands of NUPKG files using and NuGet Package Manager. Popular NuGet packages include Microsoft Entity Framework, jQuery, and JSON libraries.

How do I open a NUPKG file?

Generally, developers do not open NUPKG files. Instead, they import the files into Microsoft Visual Studio, so they can include the code contained within NUPKG files in their development projects.

To import a NUPKG file into Microsoft Visual Studio:

  1. From the Visual Studio toolbar, select Project → Manage NuGet Packages. The NuGet Package Manager appears.
  2. Select the gear icon that appears in the upper right-hand corner of the NuGet Package Manager. The Options window appears, showing a list of NuGet package sources.
  3. If the folder containing your NUPKG file does not appear in the Package sources: field, add that folder as a package source (by selecting the button and then entering the path to your folder in the Source: field). Then, select .
  4. From the Package source: dropdown menu, select your new package source.
  5. When your NUPKG file appears in the NuGet Package Manager, click it and then select .

Because NUPKG files are compressed with zip compression, you can also extract the files contained within them using zip utilities such as:

  • Microsoft File Explorer (Windows)
  • 7-Zip (Windows)
  • Apple Archive Utility (Mac)
  • Corel WinZip (Windows and Mac)

After you extract the files contained within a NUPKG package, you can open and view them normally.

NOTE: If you have trouble extracting the files contained within a NUPKG file, you can try renaming the file to use the .ZIP extension before decompressing it.

Open over 300 file formats with File Viewer Plus.

Programs that open NUPKG files

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Updated 7/6/2020

File Type 2NetUpdate Package

Open Pkg File On Win7

CategoryData Files

.NUPKG File Association 2

A NUPKG file is an update package used by NetUpdate, a software utility used for updating Intego applications. It may contain a patch or content pack for software titles such as VirusBarrier, Personal Antispam, Personal Backup, FileGuard, and ContentBarrier.

Programs that open NUPKG files

Updated 5/19/2012

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